Type: standard with reservoir bag, standard without reservoir bag, collapsible with reservoir, collapsible without reservoir. Specification: adult, children Feature: 1ã??Standard connectors ï¼?22mm 15mmï¼? 2ã??Good quality, flexible and kinking resistant. 3ã??Sizeï¼?1.2mã??1.6mã??1.8mã??2.0mã??length can be customized.